SETTING A GUN AIMER

[killzone721]

all of you know those aimers when u see them in fps games... the gun aimers. for people who don't know, i am talking about the cross thing from which you aim... hopefully u guys know what i mean now.

i know how to set it up, just set an image OF THE AIMER in the middle of the screen. the thing is how to make the background transparent

like in the case when u set up a billboard, there is function u use to set the backgorund of the billboard transparent, by setting the backgorund of the billboard to black which enables it to be transparent,

is there anything similar like to set the background color to black or any color of the aimer to make it transparent

THXS FOR ALL THE HELP

[Xaron]

Hi,

just use a HUD (head up display) texture and do the following:

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// load the hud texture
hudTexture = driver->getTexture( "media/graphics/hud/hud.png" );
// color black will be transparent
driver->makeColorKeyTexture( hudTexture, video::SColor( 0, 0, 0, 0 ) );

And in your game loop just draw it (you have to define, where your cross is located in the texture):

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driver->draw2DImage( hudTexture, core::position2d<s32>( xCenter - 16, yCenter - 16 ), core::rect<s32>( 168, 99, 168 + 33, 99 + 33 ), 0, video::SColor( 255, 255, 255, 255 ), true ); 

Regards - Xaron

[ry]

If you have a look at the examples and look into the Collision one, under the Billboard section you will find the line

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bill->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR );

That makes the Billboard transparent and also with color of the aimer, and removing the black at the same time
I hope this has helped you
Ry

[Xaron]

I don't know, why someone should use billboards for that (2d) purpose?

Regards - Xaron

[killzone721]

Xaron i don't know how to DECLARED hud...

IF YOU DON'T KNOW WHAT IT MEAN BY DECLARING... DECLARING IS SIMILAR TO WHEN YOU MAKE A DEVICE SAYING Irrlichtdevice * device=0;

can you please tell me how to declare a hud though like

/*whatever*/ * hud = 0;

[AndyCR]

try this. (credit to the other posters for most of the code, im just putting it together mostly)

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ITexture* hudTexture = driver->getTexture("replace this with your crosshair (aimer)'s filename" );
// color black will be transparent
driver->makeColorKeyTexture( hudTexture, video::SColor( 0, 0, 0, 0 ) );
device->getGUIEnvironment()->addImage(hudTexture, position2d<s32>((device->getVideoDriver()->getScreenSize().Width - hudTexture->getOriginalSize().Width) / 2, (device->getVideoDriver()->getScreenSize().Height - hudTexture->getOriginalSize().Height) / 2));

[killzone721]

AndyCR .............. THANKS A LOT

AND A LOT OF THANKS TO THE PEOPLE WHO CAME OUT WITH THIS IDEA

BUT

CREDIT GOES TO AndyCR CAUSE HE PUT THE CODE TOGETHER ... AND IT WORKS

[Frodenius]

stop screaming. please.